Pin golang.org/x/sys to fix windows compilation

Upstream golang.org/x/sys introduced a breaking change within a major
version, see golang/go#34610. The
workaround is to pin it to the last revesion that is compatible with
the version of moby/moby that we are using.

Verify that the code compiles on windows, macos and linux during our CI
run to catch problems like this one (a regression in golang.org/x/sys)
in the future as soon as it happens.

brigade.js

@@ -58,6 +58,9 @@ function test(e, project) {
     `cd ${localPath}`,
     "make bootstrap",
     "make build",
+    // Ensure that it compiles on the three main OS's
+    "GOOS=windows make build",
+    "GOOS=darwin make build",
     "make test",
     "make lint",
   ];

go.mod

@@ -16,13 +16,14 @@ require (
 	github.com/bugsnag/bugsnag-go v1.5.0 // indirect
 	github.com/bugsnag/panicwrap v1.2.0 // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
+	github.com/cespare/xxhash/v2 v2.1.0 // indirect
 	github.com/cloudflare/cfssl v1.4.1 // indirect
-	github.com/containerd/cgroups v0.0.0-20191125132625-80b32e3c75c9 // indirect
 	github.com/containerd/containerd v1.3.0 // indirect
 	github.com/containerd/continuity v0.0.0-20181203112020-004b46473808 // indirect
 	github.com/containerd/fifo v0.0.0-20190816180239-bda0ff6ed73c // indirect
 	github.com/containerd/ttrpc v0.0.0-20191028202541-4f1b8fe65a5c // indirect
 	github.com/containerd/typeurl v0.0.0-20190911142611-5eb25027c9fd // indirect
+	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e // indirect
 	github.com/docker/cli v0.0.0-20191017083524-a8ff7f821017
 	github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible
 	github.com/docker/docker v1.4.2-0.20181229214054-f76d6a078d88
@@ -49,14 +50,19 @@ require (
 	github.com/opencontainers/runtime-spec v1.0.1 // indirect
 	github.com/pivotal/image-relocation v0.0.0-20191111101224-e94aff6df06c
 	github.com/pkg/errors v0.8.1
-	github.com/prometheus/client_golang v1.2.1 // indirect
+	github.com/prometheus/client_golang v1.1.0 // indirect
+	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
+	github.com/prometheus/common v0.7.0 // indirect
+	github.com/prometheus/procfs v0.0.5 // indirect
 	github.com/qri-io/jsonschema v0.1.1
 	github.com/stretchr/testify v1.4.0
 	github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2 // indirect
 	github.com/theupdateframework/notary v0.6.1 // indirect
+	github.com/urfave/cli v1.22.1 // indirect
 	github.com/xlab/handysort v0.0.0-20150421192137-fb3537ed64a1 // indirect
 	go.etcd.io/bbolt v1.3.3 // indirect
 	golang.org/x/crypto v0.0.0-20191028145041-f83a4685e152 // indirect
+	golang.org/x/sys v0.0.0-20190830141801-acfa387b8d69 // indirect
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
 	gopkg.in/dancannon/gorethink.v3 v3.0.5 // indirect
 	gopkg.in/fatih/pool.v2 v2.0.0 // indirect

go.sum

@@ -338,6 +338,9 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829/go.mod h1:p2iRAGwDERtqlqzRXnrOVns+ignqQo//hLXqYxZYVNs=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
+github.com/prometheus/client_golang v1.1.0 h1:BQ53HtBmfOitExawJ6LokA4x8ov/z0SYYb0+HxJfRI8=
+github.com/prometheus/client_golang v1.1.0/go.mod h1:I1FGZT9+L76gKKOs5djB6ezCbFQP1xR9D75/vuwEF3g=
+github.com/prometheus/client_golang v1.2.0/go.mod h1:XMU6Z2MjaRKVu/dC1qupJI9SiNkDYzz3xecMgSW/F+U=
 github.com/prometheus/client_golang v1.2.1 h1:JnMpQc6ppsNgw9QPAGF6Dod479itz7lvlsMzzNayLOI=
 github.com/prometheus/client_golang v1.2.1/go.mod h1:XMU6Z2MjaRKVu/dC1qupJI9SiNkDYzz3xecMgSW/F+U=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
@@ -347,12 +350,14 @@ github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 h1:gQz4mCb
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/common v0.2.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
+github.com/prometheus/common v0.6.0/go.mod h1:eBmuwkDJBwy6iBfxCBob6t6dR6ENT/y+J+Zk0j9GMYc=
 github.com/prometheus/common v0.7.0 h1:L+1lyG48J1zAQXA3RBX/nG/B3gjlHq0zTt2tlbJLyCY=
 github.com/prometheus/common v0.7.0/go.mod h1:DjGbpBbp5NYNiECxcL/VnbXCCaQpKd3tt26CguLLsqA=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190522114515-bc1a522cf7b1/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
+github.com/prometheus/procfs v0.0.3/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
 github.com/prometheus/procfs v0.0.5 h1:3+auTFlqw+ZaQYJARz6ArODtkaIwtvBTx3N2NehQlL8=
 github.com/prometheus/procfs v0.0.5/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
 github.com/qri-io/jsonpointer v0.1.0 h1:OcTtTmorodUCRc2CZhj/ZwOET8zVj6uo0ArEmzoThZI=
@@ -474,6 +479,9 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190522044717-8097e1b27ff5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190830141801-acfa387b8d69 h1:Wdn4Yb8d5VrsO3jWgaeSZss09x1VLVBMePDh4VW/xSQ=
+golang.org/x/sys v0.0.0-20190830141801-acfa387b8d69/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191022100944-742c48ecaeb7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191112214154-59a1497f0cea h1:Mz1TMnfJDRJLk8S8OPCoJYgrsp/Se/2TBre2+vwX128=